Dmrs Sharing and Pdsch Rate Matching for Frequency Division Multiplexed Pdschs

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for demodulation reference signal (DMRS) sharing and physical downlink shared channel (PDSCH) rate matching for frequency division multiplexed PDSCHs.

Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, or other similar types of services. These wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available wireless communications system resources with those users.

Although wireless communications systems have made great technological advancements over many years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Accordingly, there is a continuous desire to improve the technical performance of wireless communications systems, including, for example: improving speed and data carrying capacity of communications, improving efficiency of the use of shared communications mediums, reducing power used by transmitters and receivers while performing communications, improving reliability of wireless communications, avoiding redundant transmissions and/or receptions and related processing, improving the coverage area of wireless communications, increasing the number and types of devices that can access wireless communications systems, increasing the ability for different types of devices to intercommunicate, increasing the number and type of wireless communications mediums available for use, and the like. Consequently, there exists a need for further improvements in wireless communications systems to overcome the aforementioned technical challenges and others.

One aspect provides a method for wireless communication by a user equipment (UE). The method includes receiving a first frequency domain resource allocation (FDRA) comprising an indication of a continuous set of frequency resources allocated for transmission of a plurality of frequency-division multiplexed (FDMed) physical downlink shared channel (PDSCH) transmissions for a plurality of UEs, including the UE, receiving a second FDRA comprising an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for the UE are scheduled, and receiving, using the first FDRA and the second FDRA, the one or more PDSCH transmissions for the UE on the subset of frequency resources.

Another aspect provides a method for wireless communication by a network entity. The method includes transmitting a first frequency domain resource allocation (FDRA) comprising an indication of a continuous set of frequency resources allocated for transmission of a plurality of frequency-division multiplexed (FDMed) physical downlink shared channel (PDSCH) transmissions for a plurality of user equipments (UEs), including a UE, transmitting a second FDRA comprising an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for the UE are scheduled, and transmitting, using the first FDRA and the second FDRA, the one or more PDSCH transmissions for the UE on the subset of frequency resources.

Other aspects provide: an apparatus operable, configured, or otherwise adapted to perform any one or more of the aforementioned methods and/or those described elsewhere herein; a non-transitory, computer-readable media comprising instructions that, when executed by one or more processors of an apparatus, cause the apparatus to perform the aforementioned methods as well as those described elsewhere herein; a computer program product embodied on a computer-readable storage medium comprising code for performing the aforementioned methods as well as those described elsewhere herein; and/or an apparatus comprising means for performing the aforementioned methods as well as those described elsewhere herein. By way of example, an apparatus may comprise a processing system, a device with a processing system, or processing systems cooperating over one or more networks.

The following description and the appended figures set forth certain features for purposes of illustration.

Aspects of the present disclosure provide apparatuses, methods, processing systems, and computer-readable mediums for demodulation reference signal (DMRS) sharing and physical downlink shared channel (PDSCH) rate matching for frequency division multiplexed PDSCHs.

For example, in certain scenarios, for PDSCH transmissions involving multiple small packets sent by a network entity to a cluster of user equipment (UEs), the network entity may use frequency division multiplexing (FDM) to transmit multiple PDSCHs within the same slot across an allocated frequency band or bandwidth part (BWP). This approach aims to reduce transmission latency and enhance spectral efficiency. For such cases, UEs might be configured to use a wideband demodulation reference signal (DMRS) with tones spread across the FDMed PDSCHs, improving channel estimation and time/frequency loop tracking. However, despite the improved channel estimation, the FDMed PDSCHs may not benefit from frequency diversity of the entire allocated frequency band, as they are confined to smaller, continuous frequency portions rather than spanning the entire frequency band. Consequently, because the FDMed PDSCHs do not span the entire frequency band, they may be vulnerable to fading and interference, which may cause the FDMed PDSCHs to not be properly received by the UEs and may lead to poor spectral efficiency and poor user experience.

Accordingly, aspects of the present disclosure provide techniques for joint frequency domain PDSCH rate matching to improve channel frequency diversity when transmitting FDMed PDSCHs for a plurality of UEs. In some cases, these techniques may involve a network entity providing a first frequency domain resource allocation (FDRA) that indicates a continuous set of frequency resources allocated for transmission of a plurality of FDMed PDSCH transmissions for the plurality of UEs. Additionally, these techniques may further include the network entity providing a second FDRA that includes an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for a UE are scheduled. Accordingly, the first FDRA may indicate to the UE the continuous set of resources in which FDMed PDSCHs for the plurality of UEs are allocated and the second FDRA may indicate the subset of frequency resources on which PDSCH transmissions for that particular UE are scheduled.

In this manner, the network entity may be able to spread the FDMed PDSCH transmissions for the plurality of UEs across the entire continuous set of frequency resources to improve frequency diversity of the FDMed PDSCH transmissions while also being able to indicate to each particular UE the specific subset of frequency resources on which PDSCH transmissions for that particular UE are scheduled. Accordingly, by improving the frequency diversity, the FDMed PDSCH transmissions for the plurality of UEs may be less susceptible to fading and interference, which may improve overall communication reliability and performance.

The techniques and methods described herein may be used for various wireless communications networks. While aspects may be described herein using terminology commonly associated with 3G, 4G, and/or 5G wireless technologies, aspects of the present disclosure may likewise be applicable to other communications systems and standards not explicitly mentioned herein.

1 FIG. 100 depicts an example of a wireless communications network, in which aspects described herein may be implemented.

100 100 102 140 145 Generally, wireless communications networkincludes various network entities (alternatively, network elements or network nodes). A network entity is generally a communications device and/or a communications function performed by a communications device (e.g., a user equipment (UE), a base station (BS), a component of a BS, a server, etc.). For example, various functions of a network as well as various devices associated with and interacting with a network may be considered network entities. Further, wireless communications networkincludes terrestrial aspects, such as ground-based network entities (e.g., BSs), and non-terrestrial aspects, such as satelliteand aircraft, which may include network entities on-board (e.g., one or more BSs) capable of communicating with other network elements (e.g., terrestrial BSs) and user equipments.

100 102 104 160 190 In the depicted example, wireless communications networkincludes BSs, UEs, and one or more core networks, such as an Evolved Packet Core (EPC)and 5G Core (5GC) network, which interoperate to provide communications services over various communications links, including wired and wireless links.

1 FIG. 104 104 depicts various example UEs, which may more generally include: a cellular phone, smart phone, session initiation protocol (SIP) phone, laptop, personal digital assistant (PDA), satellite radio, global positioning system, multimedia device, video device, digital audio player, camera, game console, tablet, smart device, wearable device, vehicle, electric meter, gas pump, large or small kitchen appliance, healthcare device, implant, sensor/actuator, display, internet of things (IoT) devices, always on (AON) devices, edge processing devices, or other similar devices. UEsmay also be referred to more generally as a mobile device, a wireless device, a wireless communications device, a station, a mobile station, a subscriber station, a mobile subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a remote device, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, and others.

102 104 120 120 102 104 104 102 102 104 120 BSswirelessly communicate with (e.g., transmit signals to or receive signals from) UEsvia communications links. The communications linksbetween BSsand UEsmay include uplink (UL) (also referred to as reverse link) transmissions from a UEto a BSand/or downlink (DL) (also referred to as forward link) transmissions from a BSto a UE. The communications linksmay use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity in various aspects.

102 102 110 102 110 110 BSsmay generally include: a NodeB, enhanced NodeB (eNB), next generation enhanced NodeB (ng-eNB), next generation NodeB (gNB or gNodeB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, transmission reception point, and/or others. Each of BSsmay provide communications coverage for a respective geographic coverage area, which may sometimes be referred to as a cell, and which may overlap in some cases (e.g., small cell′ may have a coverage area′ that overlaps the coverage areaof a macro cell). A BS may, for example, provide communications coverage for a macro cell (covering relatively large geographic area), a pico cell (covering relatively smaller geographic area, such as a sports stadium), a femto cell (relatively smaller geographic area (e.g., a home)), and/or other types of cells.

102 102 102 2 FIG. While BSsare depicted in various aspects as unitary communications devices, BSsmay be implemented in various configurations. For example, one or more components of a base station may be disaggregated, including a central unit (CU), one or more distributed units (DUs), one or more radio units (RUs), a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC), or a Non-Real Time (Non-RT) RIC, to name a few examples. In another example, various aspects of a base station may be virtualized. More generally, a base station (e.g., BS) may include components that are located at a single physical location or components located at various physical locations. In examples in which a base station includes components that are located at various physical locations, the various components may each perform functions such that, collectively, the various components achieve functionality that is similar to a base station that is located at a single physical location. In some aspects, a base station including components that are located at various physical locations may be referred to as a disaggregated radio access network architecture, such as an Open RAN (O-RAN) or Virtualized RAN (VRAN) architecture.depicts and describes an example disaggregated base station architecture.

102 100 102 160 132 102 190 184 102 160 190 134 Different BSswithin wireless communications networkmay also be configured to support different radio access technologies, such as 3G, 4G, and/or 5G. For example, BSsconfigured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPCthrough first backhaul links(e.g., an S1 interface). BSsconfigured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) may interface with 5GCthrough second backhaul links. BSsmay communicate directly or indirectly (e.g., through the EPCor 5GC) with each other over third backhaul links(e.g., X2 interface), which may be wired or wireless.

100 180 182 104 Wireless communications networkmay subdivide the electromagnetic spectrum into various classes, bands, channels, or other features. In some aspects, the subdivision is provided based on wavelength and frequency, where frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, or a subband. For example, 3GPP currently defines Frequency Range 1 (FR1) as including 410 MHz-7125 MHz, which is often referred to (interchangeably) as “Sub-6 GHz”. Similarly, 3GPP currently defines Frequency Range 2 (FR2) as including 24,250 MHz-71,000 MHz, which is sometimes referred to (interchangeably) as a “millimeter wave” (“mmW” or “mmWave”). In some cases, FR2 may be further defined in terms of sub-ranges, such as a first sub-range FR2-1 including 24,250 MHz-52,600 MHz and a second sub-range FR2-2 including 52,600 MHz-71,000 MHz. A base station configured to communicate using mmWave/near mmWave radio frequency bands (e.g., a mmWave base station such as BS) may utilize beamforming (e.g.,) with a UE (e.g.,) to improve path loss and range.

120 102 104 The communications linksbetween BSsand, for example, UEs, may be through one or more carriers, which may have different bandwidths (e.g., 5, 10, 15, 20, 100, 400, and/or other MHz), and which may be aggregated in various aspects. Carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL).

180 182 104 180 104 180 104 182 104 180 182 104 180 182 180 104 182 180 104 180 104 180 104 1 FIG. Communications using higher frequency bands may have higher path loss and a shorter range compared to lower frequency communications. Accordingly, certain base stations (e.g.,in) may utilize beamformingwith a UEto improve path loss and range. For example, BSand the UEmay each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming. In some cases, BSmay transmit a beamformed signal to UEin one or more transmit directions′. UEmay receive the beamformed signal from the BSin one or more receive directions″. UEmay also transmit a beamformed signal to the BSin one or more transmit directions″. BSmay also receive the beamformed signal from UEin one or more receive directions′. BSand UEmay then perform beam training to determine the best receive and transmit directions for each of BSand UE. Notably, the transmit and receive directions for BSmay or may not be the same. Similarly, the transmit and receive directions for UEmay or may not be the same.

100 150 152 154 Wireless communications networkfurther includes a Wi-Fi APin communication with Wi-Fi stations (STAs)via communications linksin, for example, a 2.4 GHz and/or 5 GHz unlicensed frequency spectrum.

104 158 158 Certain UEsmay communicate with each other using device-to-device (D2D) communications link. D2D communications linkmay use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), and/or a physical sidelink feedback channel (PSFCH).

160 162 164 166 168 170 172 162 174 162 104 160 162 EPCmay include various functional components, including: a Mobility Management Entity (MME), other MMEs, a Serving Gateway, a Multimedia Broadcast Multicast Service (MBMS) Gateway, a Broadcast Multicast Service Center (BM-SC), and/or a Packet Data Network (PDN) Gateway, such as in the depicted example. MMEmay be in communication with a Home Subscriber Server (HSS). MMEis the control node that processes the signaling between the UEsand the EPC. Generally, MMEprovides bearer and connection management.

166 172 172 172 170 176 Generally, user Internet protocol (IP) packets are transferred through Serving Gateway, which itself is connected to PDN Gateway. PDN Gatewayprovides UE IP address allocation as well as other functions. PDN Gatewayand the BM-SCare connected to IP Services, which may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS), a Packet Switched (PS) streaming service, and/or other IP services.

170 170 168 102 BM-SCmay provide functions for MBMS user service provisioning and delivery. BM-SCmay serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN), and/or may be used to schedule MBMS transmissions. MBMS Gatewaymay be used to distribute MBMS traffic to the BSsbelonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and/or may be responsible for session management (start/stop) and for collecting eMBMS related charging information.

190 192 193 194 195 192 196 5GCmay include various functional components, including: an Access and Mobility Management Function (AMF), other AMFs, a Session Management Function (SMF), and a User Plane Function (UPF). AMFmay be in communication with Unified Data Management (UDM).

192 104 190 192 AMFis a control node that processes signaling between UEsand 5GC. AMFprovides, for example, quality of service (QoS) flow and session management.

195 197 190 197 Internet protocol (IP) packets are transferred through UPF, which is connected to the IP Services, and which provides UE IP address allocation as well as other functions for 5GC. IP Servicesmay include, for example, the Internet, an intranet, an IMS, a PS streaming service, and/or other IP services.

In various aspects, a network entity or network node can be implemented as an aggregated base station, as a disaggregated base station, a component of a base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, to name a few examples.

2 FIG. 200 200 210 220 220 225 215 205 210 230 230 240 240 104 104 240 depicts an example disaggregated base stationarchitecture. The disaggregated base stationarchitecture may include one or more central units (CUs)that can communicate directly with a core networkvia a backhaul link, or indirectly with the core networkthrough one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC)via an E2 link, or a Non-Real Time (Non-RT) RICassociated with a Service Management and Orchestration (SMO) Framework, or both). A CUmay communicate with one or more distributed units (DUs)via respective midhaul links, such as an F1 interface. The DUsmay communicate with one or more radio units (RUs)via respective fronthaul links. The RUsmay communicate with respective UEsvia one or more radio frequency (RF) access links. In some implementations, the UEmay be simultaneously served by multiple RUs.

210 230 240 225 215 205 Each of the units, e.g., the CUS, the DUs, the RUs, as well as the Near-RT RICs, the Non-RT RICsand the SMO Framework, may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communications interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units. Additionally or alternatively, the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as a radio frequency (RF) transceiver), configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.

210 210 210 210 210 230 In some aspects, the CUmay host one or more higher layer control functions. Such control functions can include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU. The CUmay be configured to handle user plane functionality (e.g., Central Unit-User Plane (CU-UP)), control plane functionality (e.g., Central Unit-Control Plane (CU-CP)), or a combination thereof. In some implementations, the CUcan be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CUcan be implemented to communicate with the DU, as necessary, for network control and signaling.

230 240 230 230 230 210 rd The DUmay correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs. In some aspects, the DUmay host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3Generation Partnership Project (3GPP). In some aspects, the DUmay further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU, or with the control functions hosted by the CU.

240 240 230 240 104 240 230 230 210 Lower-layer functionality can be implemented by one or more RUs. In some deployments, an RU, controlled by a DU, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like), or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU(s)can be implemented to handle over the air (OTA) communications with one or more UEs. In some implementations, real-time and non-real-time aspects of control and user plane communications with the RU(s)can be controlled by the corresponding DU. In some scenarios, this configuration can enable the DU(s)and the CUto be implemented in a cloud-based RAN architecture, such as a vRAN architecture.

205 205 205 290 210 230 240 225 205 211 205 240 205 215 205 The SMO Frameworkmay be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Frameworkmay be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO Frameworkmay be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud)) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements can include, but are not limited to, CUs, DUs, RUsand Near-RT RICs. In some implementations, the SMO Frameworkcan communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB), via an O1 interface. Additionally, in some implementations, the SMO Frameworkcan communicate directly with one or more RUsvia an O1 interface. The SMO Frameworkalso may include a Non-RT RICconfigured to support functionality of the SMO Framework.

215 225 215 225 225 210 230 225 The Non-RT RICmay be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence/Machine Learning (AI/ML) workflows including model training and updates, or policy-based guidance of applications/features in the Near-RT RIC. The Non-RT RICmay be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC. The Near-RT RICmay be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs, one or more DUs, or both, as well as an O-eNB, with the Near-RT RIC.

225 215 225 205 215 215 225 215 205 In some implementations, to generate AI/ML models to be deployed in the Near-RT RIC, the Non-RT RICmay receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RICand may be received at the SMO Frameworkor the Non-RT RICfrom non-network data sources or from network functions. In some examples, the Non-RT RICor the Near-RT RICmay be configured to tune RAN behavior or performance. For example, the Non-RT RICmay monitor long-term trends and patterns for performance and employ AI/ML models to perform corrective actions through the SMO Framework(such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies).

3 FIG. 102 104 depicts aspects of an example BSand a UE.

102 320 330 338 340 334 334 332 332 312 339 102 102 104 102 340 a t a t Generally, BSincludes various processors (e.g.,,,, and), antennas-(collectively), transceivers-(collectively), which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., data source) and wireless reception of data (e.g., data sink). For example, BSmay send and receive data between BSand UE. BSincludes controller/processor, which may be configured to implement various functions described herein related to wireless communications.

104 358 364 366 380 352 352 354 354 362 360 104 380 a r a r Generally, UEincludes various processors (e.g.,,,, and), antennas-(collectively), transceivers-(collectively), which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., retrieved from data source) and wireless reception of data (e.g., provided to data sink). UEincludes controller/processor, which may be configured to implement various functions described herein related to wireless communications.

102 320 312 340 In regards to an example downlink transmission, BSincludes a transmit processorthat may receive data from a data sourceand control information from a controller/processor. The control information may be for the physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical HARQ indicator channel (PHICH), physical downlink control channel (PDCCH), group common PDCCH (GC PDCCH), and/or others. The data may be for the physical downlink shared channel (PDSCH), in some examples.

320 320 Transmit processormay process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Transmit processormay also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), PBCH demodulation reference signal (DMRS), and channel state information reference signal (CSI-RS).

330 332 332 332 332 332 332 334 334 a t a t a t a t Transmit (TX) multiple-input multiple-output (MIMO) processormay perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers-. Each modulator in transceivers-may process a respective output symbol stream to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from the modulators in transceivers-may be transmitted via the antennas-, respectively.

104 352 352 102 354 354 354 354 a r a r a r In order to receive the downlink transmission, UEincludes antennas-that may receive the downlink signals from the BSand may provide received signals to the demodulators (DEMODs) in transceivers-, respectively. Each demodulator in transceivers-may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples to obtain received symbols.

356 354 354 358 104 360 380 a r MIMO detectormay obtain received symbols from all the demodulators in transceivers-, perform MIMO detection on the received symbols if applicable, and provide detected symbols. Receive processormay process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UEto a data sink, and provide decoded control information to a controller/processor.

104 364 362 380 364 364 366 354 354 102 a r In regards to an example uplink transmission, UEfurther includes a transmit processorthat may receive and process data (e.g., for the PUSCH) from a data sourceand control information (e.g., for the physical uplink control channel (PUCCH)) from the controller/processor. Transmit processormay also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS)). The symbols from the transmit processormay be precoded by a TX MIMO processorif applicable, further processed by the modulators in transceivers-(e.g., for SC-FDM), and transmitted to BS.

102 104 334 332 332 336 338 104 338 339 340 a t a t At BS, the uplink signals from UEmay be received by antennas-, processed by the demodulators in transceivers-, detected by a MIMO detectorif applicable, and further processed by a receive processorto obtain decoded data and control information sent by UE. Receive processormay provide the decoded data to a data sinkand the decoded control information to the controller/processor.

342 382 102 104 Memoriesandmay store data and program codes for BSand UE, respectively.

344 Schedulermay schedule UEs for data transmission on the downlink and/or uplink.

102 312 344 342 320 340 330 332 334 334 332 336 340 338 344 342 a t a t a t a t In various aspects, BSmay be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, “transmitting” may refer to various mechanisms of outputting data, such as outputting data from data source, scheduler, memory, transmit processor, controller/processor, TX MIMO processor, transceivers-, antenna-, and/or other aspects described herein. Similarly, “receiving” may refer to various mechanisms of obtaining data, such as obtaining data from antennas-, transceivers-, RX MIMO detector, controller/processor, receive processor, scheduler, memory, and/or other aspects described herein.

104 362 382 364 380 366 354 352 352 354 356 380 358 382 a t a t a t a t In various aspects, UEmay likewise be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, “transmitting” may refer to various mechanisms of outputting data, such as outputting data from data source, memory, transmit processor, controller/processor, TX MIMO processor, transceivers-, antenna-, and/or other aspects described herein. Similarly, “receiving” may refer to various mechanisms of obtaining data, such as obtaining data from antennas-, transceivers-, RX MIMO detector, controller/processor, receive processor, memory, and/or other aspects described herein.

In some aspects, one or more processors may be configured to perform various operations, such as those associated with the methods described herein, and transmit (output) to or receive (obtain) data from another interface that is configured to transmit or receive, respectively, the data.

4 4 4 4 FIGS.A,B,C, andD 1 FIG. 100 depict aspects of data structures for a wireless communications network, such as wireless communications networkof.

4 FIG.A 4 FIG.B 4 FIG.C 4 FIG.D 400 430 450 480 In particular,is a diagramillustrating an example of a first subframe within a 5G (e.g., 5G NR) frame structure,is a diagramillustrating an example of DL channels within a 5G subframe,is a diagramillustrating an example of a second subframe within a 5G frame structure, andis a diagramillustrating an example of UL channels within a 5G subframe.

4 4 FIGS.B andD Wireless communications systems may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink. Such systems may also support half-duplex operation using time division duplexing (TDD). OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth (e.g., as depicted in) into multiple orthogonal subcarriers. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain with OFDM and/or in the time domain with SC-FDM.

A wireless communications frame structure may be frequency division duplex (FDD), in which, for a particular set of subcarriers, subframes within the set of subcarriers are dedicated for either DL or UL. Wireless communications frame structures may also be time division duplex (TDD), in which, for a particular set of subcarriers, subframes within the set of subcarriers are dedicated for both DL and UL.

4 4 FIGS.A andC In, the wireless communications frame structure is TDD where D is DL, U is UL, and X is flexible for use between DL/UL. UEs may be configured with a slot format through a received slot format indicator (SFI) (dynamically through DL control information (DCI), or semi-statically/statically through radio resource control (RRC) signaling). In the depicted examples, a 10 ms frame is divided into 10 equally sized 1 ms subframes. Each subframe may include one or more time slots. In some examples, each slot may include 7 or 14 symbols, depending on the slot format. Subframes may also include mini-slots, which generally have fewer symbols than an entire slot. Other wireless communications technologies may have a different frame structure and/or different channels.

μ 4 4 4 4 FIGS.A,B,C, andD In certain aspects, the number of slots within a subframe is based on a slot configuration and a numerology. For example, for slot configuration 0, different numerologies (μ) 0 to 6 allow for 1, 2, 4, 8, 16, 32, and 64 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology μ, there are 14 symbols/slot and 2 μ slots/subframe. The subcarrier spacing and symbol length/duration are a function of the numerology. The subcarrier spacing may be equal to 2×15 kHz, where μ is the numerology 0 to 6. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=6 has a subcarrier spacing of 960 kHz. The symbol length/duration is inversely related to the subcarrier spacing.provide an example of slot configuration 0 with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.

4 4 4 4 FIGS.A,B,C, andD As depicted in, a resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs)) that extends, for example, 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

4 FIG.A 1 3 FIGS.and 104 As illustrated in, some of the REs carry reference (pilot) signals (RS) for a UE (e.g., UEof). The RS may include demodulation RS (DMRS) and/or channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS), beam refinement RS (BRRS), and/or phase tracking RS (PT-RS).

4 FIG.B illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE including, for example, nine RE groups (REGs), each REG including, for example, four consecutive REs in an OFDM symbol.

104 1 3 FIGS.and A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE (e.g.,of) to determine subframe/symbol timing and a physical layer identity.

A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing.

Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI). Based on the PCI, the UE can determine the locations of the aforementioned DMRS. The physical broadcast channel (PBCH), which carries a master information block (MIB), may be logically grouped with the PSS and SSS to form a synchronization signal (SS)/PBCH block. The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs), and/or paging messages.

4 FIG.C 104 As illustrated in, some of the REs carry DMRS (indicated as R for one particular configuration, but other DMRS configurations are possible) for channel estimation at the base station. The UE may transmit DMRS for the PUCCH and DMRS for the PUSCH. The PUSCH DMRS may be transmitted, for example, in the first one or two symbols of the PUSCH. The PUCCH DMRS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. UEmay transmit sounding reference signals (SRS). The SRS may be transmitted, for example, in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

4 FIG.D illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and HARQ ACK/NACK feedback. The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and/or UCI.

5 FIG. 5 FIG. 500 500 104 1 104 2 104 3 502 104 1 104 2 104 3 110 104 1 104 2 104 3 104 1 104 2 104 3 is a diagram illustrating an exampleassociated with shared DMRS resources among multiple UEs, in accordance with the present disclosure. As shown in, exampleincludes a frequency division multiplexed (FDMed) physical downlink shared channel (PDSCH) for a first UE-, a second UE-, and a third UE-allocated in a frequency bandand a same transmission time interval (TTI) (e.g., slot n for PDSCH). The first UE-, the second UE-, and the third UE-may receive a resource grant from a network node (such as network node). The resource grant may grant resources for each of the first UE-, the second UE-, and/or the third UE-to receive DCI. In some aspects, the resource grant may grant resources for the first UE-, the second UE-, and/or the third UE-to receive one or more DMRSs.

104 1 104 2 104 3 104 1 104 2 104 3 In some aspects, the resource grant may include grant for one or more shared DMRSs. The term “shared DMRS” refers to an FDMed DMRS used by multiple UEs configured for FDM within a TTI. In some aspects, the resource grant may indicate whether the DMRS may be shared by multiple UEs. In some aspects, the resource grant may indicate the DMRS pattern. In some aspects, one or more of the first UE-, the second UE-, and/or the third UE-may share a precoder so the DMRS may be shared for channel estimation. In some aspects, the network node may indicate, to the first UE-, the second UE-, and/or the third UE-, a subset of DMRS resources which use the same precoder.

104 1 104 1 104 1 504 504 104 1 504 504 104 1 104 2 104 3 To allow the first UE-to combine a shared DMRS from another PDSCH for wideband channel estimation or tracking loops, the network node may schedule one or more PDSCHs with the same precoder and indicate, to the first UE-, the usable DMRS resources across one or more FDMed PDSCHs. In some aspects, the network node may indicate, to the first UE-, the usable and combinable DMRS resources across multiple FDMed PDSCHs via a UE-specific or group common DCI. The UE specific DCImay schedule the PDSCH for the first UE-, and additional fields in the DCImay indicate the combinable DMRS resources in the FDMed PDSCHs for improved channel estimation, tracking loop updates, and/or a combination thereof, among other examples. The group common DCImay indicate, to a preconfigured group of UEs (such as the first UE-, the second UE-, and/or the third UE-), that DMRS resources in one or more FDMed PDSCH can be shared for tracking loop updates.

104 1 104 1 504 104 1 104 2 104 1 104 3 104 2 104 1 104 2 104 1 104 3 104 1 104 3 104 1 In some aspects, to allow the first UE-to combine the shared DMRS from another PDSCH for wideband channel estimation or tracking loops, the network node may schedule two PDSCHs with the same precoder and indicate, to the first UE-, the usable DMRS frequency resources across multiple PDSCH allocations. In some aspects, the DCImay include one or more frequency domain resource assignments (FDRAs). For example, a first FDRA may indicate, to the first UE-, one or more shared DMRS resources in the FDMed PDSCH of the second UE-. A second FDRA may indicate, to the first UE-, one or more shared DMRS resources in the FDMed PDSCH of the third UE-. In some aspects, the FDMed PDSCH of the second UE-is contiguous with the PDSCH of the first UE-. In some aspects, the FDMed PDSCH of the second UE-is not contiguous with the PDSCH of the first UE-. In some aspects, the FDMed PDSCH of the third UE-is contiguous with the PDSCH of the first UE-. In some aspects, the FDMed PDSCH of the third UE-is not contiguous with the PDSCH of the first UE-. In some aspects, resources for the shared DMRS may be granted in instances of contiguous PDSCH allocations. For contiguous shared DMRS allocations across multiple FDMed PDSCHs, an additional FDRA (e.g., the first FDRA, the second FDRA, or a third FDRA) may indicate an entire frequency span of sharable DMRS tones. In some aspects, the frequency span may include an original PDSCH frequency allocation, if any. In some aspects, the frequency span may be derived from a PDSCH FDRA. In some aspects, if other sharable DMRS tones from other FDMed PDSCHs are allowed to be non-contiguous, one FDRA may be used per contiguous segment of sharable DMRS tones. Multiple FDRAs may be used if the sharable DMRS tones are from multiple non-contiguous FDMed PDSCHs.

104 1 104 2 104 3 504 504 104 1 504 504 104 1 To improve the edge tone channel estimation for a physical resource block group (PRG)-based minimum mean square error (MMSE) channel estimation, the first UE-may include DMRS tones of one or more adjacent UEs (e.g., the second UE-and/or the third UE-) to treat edge orphan resource blocks (RBs) as a whole PRG. For PRG-based frequency channel estimation, the DCImay indicate if the DMRS tones on the upper and/or lower edge of the PDSCH allocation can be combined (e.g., shared) with the edge DMRS tones of the FDMed PDSCHs. In some aspects, two bits in the DCImay be used to provide the indication. For example, a first bit may indicate whether the DMRS tones on the upper edge RBs can be combined, and a second bit may indicate whether the DMRS tones on the lower edge RBs can be combined. In some aspects, the first UE-may be configured to use the first bit, the second bit, or both, in the DCIto determine if the DMRS RBs can be shared between adjacent PDSCHs to make an edge orphan RB into whole PRG so a full MMSE channel estimation matrix may be applied. In some aspects, to improve the edge tone channel estimation with MMSE interpolation instead of extrapolation, the first bit, the second bit, or both, in the DCImay indicate whether the first UE-can interpolate the PDSCH edge tone from a preconfigured number of DMRS tones from one or more adjacent PDSCHs.

104 1 104 2 104 3 104 1 504 104 1 504 104 3 104 1 104 3 In some aspects, the network node may be configured to select different DMRS ports for shared DMRS tones across FDMed PDSCHs. The UEs (such as the first UE-, the second UE-, and/or the third UE-), may be configured to combine the shared DMRS by using the same precoder as, for example, the PDSCH of the first UE-. In some aspects, the network node may output the DCIto indicate the DMRS ports for shared DMRS resources in another FDMed PDSCH. In some aspects, the number of DMRS ports in another FDMed PDSCH may be the same as the number of DMRS ports in the PDSCH of the first UE-. In some aspects, the DCImay indicate the DMRS port index (or indices) associated with the shared DMRS tones for each sharable PDSCH. The port of the shared DMRS tones may be in a different orthogonal codebook configuration (OCC) in a same code division multiplexing (CDM) group. For example, in MU-MIMO communication, the network node may be configured to select port 1 to transmit the PDSCH to the third UE-using the same precoder as the PDSCH transmitted in port 0 to the first UE-. Port 0 of the frequency resources for the third UE-, therefore, may be assigned to another UE with a different precoder.

104 1 104 1 104 2 104 3 104 1 504 104 1 In some aspects, an initial seed of a DMRS sequence may depend on two scrambling identifiers (e.g., scramblingID0 and scrambling ID1). For DCI format 1_1, a DMRS sequence initialization value may be associated with one of the scrambling identifiers. In some aspects, for the first UE-to descramble the DMRS tones for a sharable PDSCH, the first UE-may receive the scrambling identifier. In some aspects, the sharable PDSCH (e.g., the PDSCH of the second UE-or the PDSCH of the third UE-) may be RRC-configured with the same scrambling identifier as the PDSCH of the first UE-. If the sharable PDSCH dynamically changes the scrambling identifier based on a DCI indication, the DCIfor the first UE-may indicate, for each sharable PDSCH, that the scrambling identifier was dynamically changed.

104 1 104 1 104 1 104 1 104 1 104 1 In some aspects, to have the shared DMRS in the same DMRS symbols and comb pattern as in the PDSCH of the first UE-, the DMRS configuration type, PDSCH mapping time, the number of DMRS symbols, and a DMRS additional position may be aligned. For example, relative to the PDSCH of the first UE-, the sharable PDSCH may be configured with the same DMRS configuration type, the same PDSCH mapping type, the same single or double symbol DMRS, the same DMRS locations, and/or a combination thereof, among other examples. The network node may be configured to confirm that the PDSCHs (e.g., the sharable PDSCH and the PDSCH of the first UE-) have the same configuration before indicating the first UE-to combine the DMRS tones from one or more other PDSCHs. For the same DMRS locations, the sharable PDSCH may have more DMRS symbols than the PDSCH of the first UE-. In some aspects, the DMRS symbols of the PDSCH of the first UE-may be a subset of the DMRS symbols of the sharable PDSCH.

504 504 504 504 504 504 504 504 104 1 104 2 104 3 In some aspects, due to power control for different UEs, the Rx power from sharable DMRS tones in different FDMed PDSCHs may be different. To allow the DMRS to be combinable for channel estimation, the power of the DMRS may be normalized. In some aspects, the DCImay indicate a power scaling offset factor for each FDMed PDSCH with respect to a reference PDSCH. The DCImay indicate the transmit (Tx) power offset for each FDMed PDSCH with respect to the reference PDSCH due to PDSCH power control. If the DCIis used to schedule a PDSCH, the DCImay be used to schedule the reference PDSCH. If the DCIis not used to schedule a PDSCH (e.g., group common DCI), the reference PDSCH may be specified in the DCI. In some aspects, the reference PDSCH may be the FDMed PDSCH in a lowest frequency or the FDMed PDSCH in a highest frequency. In some aspects, the reference PDSCH may be explicitly indicated via an FDMed PDSCH index where the indexing may order the FDMed PDSCHs by frequency (e.g., lowest frequency to highest frequency or highest frequency to lowest frequency). In some aspects, such as when there is not an independent FDRA indication for each FDMed PDSCH, a single DMRS FDRA may be signaled in the DCI. In some aspects, the DCImay further indicate a relative starting RB, the number of RBs for each FDMed PDSCH, and/or a combination thereof, among other examples. In some aspects, the UE (e.g., the first UE-, the second UE-, and/or the third UE-) may be configured to determine the power scaling offset relative to a segment of the DMRS tones.

5 FIG. 5 FIG. 104 1 104 2 104 3 502 502 104 1 104 2 104 3 In some cases, for PDSCH transmissions with multiple small packets that are transmitted by the network entity towards a same cluster of UEs, the network entity may want to FDM multiple PDSCHs in a same slot to reduce transmission latency and improve spectral efficiency. Accordingly, as discussed above with respect to, PDSCH transmissions for a plurality of UEs may be transmitted by the network entity using FDM. In such scenarios, these UEs may be configured to use a wideband demodulation reference signal (DMRS) including tones allocated across the FDMed PDSCHs to improve the channel estimation and time/frequency loop tracking. However, even though the channel estimation quality may be improved by using the wideband DMRS, the FDMed PDSCH may not benefit from frequency diversity of the entire allocated bandwidth. For example, as shown in, the PDSCH for each of the first UE-, the second UE-, and the third UE-is allocated to only a smaller, continuous portion of the frequency bandrather than being spread across the entire frequency band. As a result, due to the lack of frequency diversity, the PDSCH for each of the first UE-, the second UE-, and the third UE-may be more susceptible to fading and interference, which may degrade overall communication reliability and performance.

Accordingly, aspects of the present disclosure provide techniques for joint frequency domain PDSCH rate matching to improve channel frequency diversity when transmitting FDMed PDSCHs for a plurality of UEs. In some cases, these techniques may involve a network entity providing a first frequency domain resource allocation (FDRA) that indicates a continuous set of frequency resources allocated for transmission of a plurality of FDMed PDSCH transmissions for the plurality of UEs. Additionally, these techniques may further include the network entity providing a second FDRA that includes an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for a UE are scheduled. Accordingly, the first FDRA may indicate to the UE the continuous set of resources in which FDMed PDSCHs for the plurality of UEs are allocated and the second FDRA may indicate the subset of frequency resources on which PDSCH transmissions for that particular UE are scheduled.

In this manner, the network entity is able to spread the FDMed PDSCH transmissions for the plurality of UEs across the entire continuous set of frequency resources to improve frequency diversity of the FDMed PDSCH transmissions while also being able to indicate to each particular UE the specific subset of frequency resources on which PDSCH transmissions for that particular UE are scheduled. Accordingly, by improving the frequency diversity, the FDMed PDSCH transmissions for the plurality of UEs may be less susceptible to fading and interference, which may improve overall communication reliability and performance.

6 FIG. 1 3 FIGS.and 2 FIG. 1 3 FIGS.and 600 602 604 602 102 604 104 604 602 depicts a process flow including operationsfor communications in a network between a network entityand a user equipment (UE). In some aspects, the network entitymay be an example of the BSdepicted and described with respect toor a disaggregated base station depicted and described with respect to. Similarly, the UEmay be an example of UEdepicted and described with respect to. However, in other aspects, UEmay be another type of wireless communications device and network entitymay be another type of network entity or network node, such as those described herein.

600 610 604 602 604 602 As shown, operationsbegin atwith the UEreceiving, from the network entity, a first FDRA comprising an indication of a continuous set of frequency resources allocated for transmission of a plurality of FDMed PDSCH transmissions for a plurality of UEs, including the UE. In some cases, the plurality of FDMed PDSCH transmissions for the plurality of UEs may share a same wide-band precoder in the continuous set of frequency resources. In some cases, the first FDRA may be included within a first downlink control information (DCI) message transmitted by the network entity. In some cases, the continuous set of frequency resources may comprise a bandwidth part (BWP).

612 604 602 604 602 602 As shown at, the UEreceives, from the network entity, a second FDRA comprising an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for the UEare scheduled. In some cases, the subset of frequency resources may comprise a subset of resource elements (REs) or a subset of resource blocks (RBs) of the continuous set of frequency resources. In some cases, the second FDRA may also be included in the first DCI message transmitted by the network entityor may be included in a second DCI message transmitted by the network entity.

616 604 604 At, the UEreceives, using the first FDRA and the second FDRA, the one or more PDSCH transmissions for the UE on the subset of frequency resources. In some cases, the one or more PDSCH transmissions for the UEmay be rate matched to the subset of frequency resources while a remaining subset of frequency resources of the continuous set of frequency resources may be rate matched to other UEs in the plurality of UEs.

604 In some cases, the subset of frequency resources on which one or more PDSCH transmissions for the UEare scheduled may be indicated in different manners. For example, in some cases, the subset of frequency resources may be indicated as one or more interlaces of frequency resources of a plurality of interlaces included within the continuous set of frequency resources.

7 FIG. 6 FIG. 700 700 702 0 1 2 703 0 1 2 604 702 702 704 0 706 0 708 1 710 2 illustrates an example frequency resource allocationincluding a plurality of interlaces of frequency resources. For example, as shown, the frequency resource allocationincludes a continuous set of frequency resourcesallocated for transmission of a plurality of FDMed PDSCH transmissions for a plurality of UEs, such as UE, UE, and UE, in a slot(e.g., a TTI). In some cases, any of UE, UE, or UEmay be representative of UEdescribed with respect to. As discusses above, the continuous set of frequency resourcesmay be indicated in the first FDRA. Additionally, as shown, the continuous set of frequency resourcesincludes a plurality of interlaces of frequency resources, including a first interlace of frequency resourcesassociated with UE, a second interlace of frequency resourcesassociated with UE, a third interlace of frequency resourcesassociated with UE, and a fourth interlace of frequency resourcesassociated with UE.

704 704 704 704 704 704 706 706 706 706 706 706 708 708 708 708 708 710 710 710 710 710 a b c d e a b c d e a b c d a b c d. Further, as shown, each interlace of frequency resources of the plurality of interlaces of frequency resources includes a plurality of interlace clusters. For example, the first interlace of frequency resourcesincludes interlace clusters,,,, and. Similarly, the second interlace of frequency resourcesincludes interlace clusters,,,, and. Additionally, the third interlace of frequency resourcesincludes interlace clusters,,, and. Additionally, the fourth interlace of frequency resourcesincludes interlace clusters,,, and

7 FIG. 704 704 a b As shown, each interlace of frequency resources may have a particular structure. In some cases, the structure of an interlace of frequency resources may be defined by a first number of REs/RBs per interlace cluster of the interlace of frequency resources and a second number of REs/RBs between interlace clusters of the interlace of frequency resources. For example, as shown, each interlace cluster of the plurality of interlace clusters of an interlace of frequency resources occupies a first number of frequency resources (e.g., REs or RBs) of the continuous set of frequency resources. Additionally, as shown, each interlace cluster of the plurality of interlace clusters is separated from another interlace cluster of the plurality of interlace clusters by a second number of frequency resources (e.g., REs or RBs) of the continuous set of frequency resources. For example, as can be seen in, the interlace clusteroccupies one RB and is separated from interlace clusterby three RBs.

7 FIG. 4 0 704 0 706 1 708 2 710 3 4 1 1 704 0 706 1 708 2 710 3 a a a a b b b b Further, as shown in, each interlace cluster of the plurality of interlace clusters of an interlace of frequency resources may be indexed periodically within a precoding resource group (PRG) using an interlace index. For example, as shown, a first-RB PRG (e.g., PRG) may include the interlace clusterhaving an index, the interlace clusterhaving an index, the interlace clusterhaving an index, and the interlace clusterhaving an index. Thereafter, as shown, the indices repeat for a second-RB PRG (e.g., PRG). For example, as shown, PRGincludes the interlace clusterhaving an index, the interlace clusterhaving an index, the interlace clusterhaving an index, and the interlace clusterhaving an index, and so on.

6 FIG. 7 FIG. 604 612 604 604 0 704 706 604 704 706 a e a e. Returning to, in some cases, the indication of the subset of frequency resources in the second FDRA received by the UEatmay comprise an indication of at least a first interlace of frequency resources assigned to the UEon which the one or more PDSCH transmissions for the UE are scheduled. In some cases, the subset of frequency resources on which the one or more PDSCH transmissions for the UE are scheduled comprise the plurality of interlace clusters of at least the first interlace of frequency resources. For example, assuming that UEis UEin, the second FDRA may include an indication of the first interlace of frequency resourcesand the second interlace of frequency resourceson which an FDMed PDSCH(s) is scheduled for the UE. Additionally, in this scenario, the subset of frequency resources may include-and-

602 604 616 604 602 604 6 FIG. As noted above, each interlace of frequency resources may have a particular structure. Accordingly, in some cases, the network entitymay transmit configuration information, to the UEatin, including an indication of the structure of at least the first interlace of frequency resources assigned to the UE. For example, the network entitymay be configured to transmit configuration information to the UEthat indicates (1) the first number of frequency resources occupied by each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources and (2) the second number of frequency resources separating each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources. In some cases, the configuration information comprises one of a radio resource control (RRC) message, a layer 2 (L2) message, or a DCI message.

In some cases, the indication of at least the first interlace of frequency resources comprises a bitmap. In some cases, the bitmap comprises a plurality of bits and each different bit of the plurality of bits corresponds to a different interlace of frequency resources of the plurality of interlaces of frequency resources. In some cases, a first bit value of the different bit indicates that the different interlace corresponding to that different bit is assigned to the UE. In some cases, a second bit value of the different bit indicates that the different interlace corresponding to that different bit is not assigned to the UE. In some cases the first bit value may equal 1 and the second bit value may equal 0 or vice versa.

704 706 708 710 604 0 704 706 604 708 710 604 7 FIG. 7 FIG. For example, assuming a four-bit bitmap, a first bit of the bitmap may correspond to the first interlace of frequency resourcesof, a second bit of the bitmap may correspond to the second interlace of frequency resources, a third bit of the bitmap may correspond to the second interlace of frequency resources, and a fourth bit of the bitmap may correspond to the second interlace of frequency resources. Accordingly, assuming that UEis UEin, the bitmap may equal 1100, indicating that the first interlace of frequency resourcesand the second interlace of frequency resourcesare both assigned to the UEwhile the third interlace of frequency resourcesand the fourth interlace of frequency resourcesare not assigned to the UE.

704 704 706 604 704 706 604 In some cases, the indication of the subset of frequency resources in the second FDRA comprises a resource indication value (RIV). For example, in some cases, the RIV may indicate a starting interlace and a number of contiguous interlaces that are assigned to the UE starting from the starting interlace. For example, the RIV may indicate the first interlace of frequency resourcesas the starting interlace and may indicate that there is two contiguous interlaces (e.g., the first interlace of frequency resourcesand the second interlace of frequency resources). Accordingly, based on the RIV, the UEmay determine that the first interlace of frequency resourcesand the second interlace of frequency resourcesare both assigned to the UE.

7 FIG. 702 702 702 In some cases, the number of interlaces of frequency resources of the plurality of interlaces of frequency resources may be configurable. For example,illustrates four interlaces for the continuous set of frequency resources. However, it should be appreciated that the number of interlaces of frequency resources for the continuous set of frequency resourcescould be another number, such as 2 or 3. In such cases, a length of the bitmap (e.g., number of bits in the bitmap) and a length of the RIV may be a function of the number of interlaces of frequency resources of the plurality of interlaces of frequency resources of the continuous set of frequency resources.

618 604 620 604 614 6 FIG. In some cases, in addition to the FDMed PDSCHs allocated for transmission within the continuous set of frequency resources indicated within the first FDRA, the continuous set of frequency resources may also include a set of FDMed DMRSs that may be shared among UEs and used for channel estimation and to improve demodulation of the FDMed PDSCHs. For example, as shown atin, the UEmay receive one or more DMRSs of the set of shared DMRSs. At, the UEmay then demodulate the one or more PDSCH transmissions received atbased on the received one or more DMRSs.

7 FIG. 7 FIG. 700 712 712 703 0 2 702 703 703 703 702 703 712 702 For example, as shown in, the frequency resource allocationincludes a set of shared DMRSsthat are scheduled for transmission across the continuous set of frequency resources. In the example shown in, DMRS of the set of shared DMRSsare shown as being contiguous in a frequency domain and being scheduled at the beginning of slotprior to the FDMed PDCHs for UEs-. However, it should be appreciated that the individual DMRS of the set of shared DMRSs may be distributed in time and frequency across the continuous set of frequency resourcesand the slot. For example, some shared DMRSs of the set of shared DMRSs may be transmitted at the end of the slot, in the middle of slot, or, for example, any REs in the continuous set of frequency resourcesand slotthat are not scheduled for PDSCH transmissions. In other words, the set of shared DMRSsmay be scheduled in frequency resources (e.g., REs), of the continuous set of frequency resources, that are not scheduled for PDSCH transmissions of the plurality of FDMed PDSCH transmissions.

604 604 As noted above, the subset of frequency resources on which one or more PDSCH transmissions for the UEare scheduled may be indicated in different manners. For example, in some cases, rather than indicating the subset of frequency resources as an interlace of frequency resources, the subset of frequency resources may be indicated based on frequency domain resource block group (RBG)-based interleaving. Accordingly, for example, in some cases, an RBG-based VRB-to-PRB interleaver may be defined and may be used to map virtual resource blocks (VRBs) to physical resource blocks (PRBs) that are scheduled with PDSCH transmissions for the UEwithin the continuous set of frequency resources. In some cases, contiguous PRBs in the continuous set of frequency resources indicated in the first FDRA may be are grouped into an RBG with predetermined RBG size. In some cases, the RBG size may be 1, 2, or 4 RBs. In some cases, the RBG-based VRB-to-PRB interleaver may be configured based on the entire continuous set of frequency resources with a preconfigured interleaver depth, which may specify the number of rows of the RBG-based VRB-to-PRB interleaver. In some cases, RBGs may be sequentially input into the predefined interleaver with column first and row second manner and read out from interleaver with row first and column second manner.

8 FIG. 8 FIG. 800 800 802 801 803 801 0 7 802 804 illustrates an exampleof the RBG-based interleaving discussed above. As shown, the exampleincludes a continuous set of frequency resourcesthat include a plurality of virtual resource blocks (VRBs)that may map to a plurality of PRBs. The plurality of VRBsmay be arranged or included in a plurality of RBGs, such as RBGthrough RBG, defined within the continuous set of frequency resources. As shown at, the plurality of RBGs may then be input into the RBG-based VRB-to-PRB interleaver having a defined interleaver depth (e.g., 2 rows in).

802 804 802 804 As noted above, in some cases, the continuous set of frequency resourcesare included within a BWP. In some cases, the RBG-based VRB-to-PRB interleaver shown atmay be defined with respect to the continuous set of frequency resourcesrather than the BWP, which may be indicated in the first FDRA described above. In some cases, the RBG-based VRB-to-PRB interleaver shown atmay be defined with respect to the BWP.

0 0 0 1 0 1 2 1 0 801 803 604 As shown, the plurality of RBGs may be input into the RBG-based VRB-to-PRB interleaver in a column first and row second manner and read out from interleaver with row first and column second manner. For example, RBGmay be input first into the RBG-based VRB-to-PRB interleaver in columnand row. Thereafter, RBGmay be input into columnand row. Thereafter, RBGmay be input into columnand row, and so on. Thereafter, the RBGs may be read out of the RBG-based VRB-to-PRB interleaver in a row first and column second manner to obtain a VRB-to-PRB mapping (e.g., mapping the plurality of VRBsto the plurality of PRBs), which may be used to indicate the subset of frequency resources on which the one or more PDSCHs for the UEare scheduled.

6 FIG. 6 FIG. 8 FIG. 8 FIG. 8 FIG. 604 614 0 7 802 804 For example, returning to, in some cases, the indication of a subset of frequency resources in the second FDRA received by the UEatinmay comprise an indication of a set of VRBs included within one or more RBGs (e.g., RBGthrough RBGof) defined within the continuous set of frequency resources (e.g., the continuous set of frequency resourcesof). In some cases, the set of VRBs are defined with respect to the continuous set of frequency resources (e.g., a BWP). As described above, the set of VRBs may map to a corresponding set of PRBs in the continuous set of frequency resources indicated in the first FDRA based on the RBG-based VRB-to-PRB interleaver (e.g., the RBG-based VRB-to-PRB interleaver shown atin). In some cases, the subset of frequency resources comprise the set of PRBs.

604 602 616 602 6 FIG. In some cases, the UEmay receive an indication of an interleaver depth of the RBG-based VRB-to-PRB interleaver from the network entity, such as in the configuration information transmitted atin. In some cases, the indication of the interleaver depth is received in RRC signaling from a network entity. In some cases, the UE may determine the set of PRBs to which the set of VRBs correspond based on the interleaver depth of the RBG-based VRB-to-PRB interleaver.

In some cases, the indication of the set of VRBs comprises one of (1) a bitmap defined with respect to the continuous set of frequency resources indicated in the first FDRA or (2) a RIV defined with respect to the continuous set of frequency resources indicated in the first FDRA. In some cases, the continuous set of frequency resources may be defined within a BWP. Assuming that the BWP is 100 resource blocks (RBs) and that the first FDRA indicates that the continuous set of frequency resources comprises RBs 50-100, the RIV encoding may be based on the 100 RBs of the BWP or the 50 RBs indicated by the first FDRA.

9 FIG. 1 3 FIGS.and 900 104 shows an example of a methodof wireless communication at a user equipment (UE), such as a UEof.

900 905 11 FIG. Methodbegins at stepwith receiving a first frequency domain resource allocation (FDRA) comprising an indication of a continuous set of frequency resources allocated for transmission of a plurality of frequency-division multiplexed (FDMed) physical downlink shared channel (PDSCH) transmissions for a plurality of UEs, including the UE. In some cases, the operations of this step refer to, or may be performed by, circuitry for receiving and/or code for receiving as described with reference to.

900 910 11 FIG. Methodthen proceeds to stepwith receiving a second FDRA comprising an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for the UE are scheduled. In some cases, the operations of this step refer to, or may be performed by, circuitry for receiving and/or code for receiving as described with reference to.

900 915 11 FIG. Methodthen proceeds to stepwith receiving, using the first FDRA and the second FDRA, the one or more PDSCH transmissions for the UE on the subset of frequency resources. In some cases, the operations of this step refer to, or may be performed by, circuitry for receiving and/or code for receiving as described with reference to.

In some aspects, the one or more PDSCH transmissions for the UE are rate matched to the subset of frequency resources.

In some aspects, the plurality of FDMed PDSCH transmissions for the plurality of UEs share a same wide-band precoder.

In some aspects, a set of shared demodulation reference signals (DMRSs) are scheduled for transmission across the continuous set of frequency resources; and the method further comprises: receiving one or more DMRSs of the set of shared DMRSs; and demodulating the received one or more PDSCH transmissions based on the received one or more DMRSs.

In some aspects, at least some DMRSs of the set of shared DMRSs are contiguous in a frequency domain.

In some aspects, the set of shared DMRSs are scheduled in frequency resources, of the continuous set of frequency resources, that are not scheduled for PDSCH transmissions of the plurality of FDMed PDSCH transmissions.

In some aspects, the continuous set of frequency resources comprises a plurality of interlaces of frequency resources.

In some aspects, each interlace of frequency resources of the plurality of interlaces of frequency resources comprises a plurality of interlace clusters; each interlace cluster of the plurality of interlace clusters occupies a first number of frequency resources of the continuous set of frequency resources; and each interlace cluster of the plurality of interlace clusters is separated from another interlace cluster of the plurality of interlace clusters by a second number of frequency resources of the continuous set of frequency resources.

In some aspects, the first number of frequency resources comprise one of a first number of resource elements (REs) or a first number of resource blocks (RBs), and the second number of frequency resources comprise one of a second number of REs or a second number of RBs.

In some aspects, the indication of the subset of frequency resources in the second FDRA comprises an indication of at least a first interlace of frequency resources assigned to the UE on which the one or more PDSCH transmissions for the UE are scheduled; and the subset of frequency resources on which the one or more PDSCH transmissions for the UE are scheduled comprise the plurality of interlace clusters of at least the first interlace of frequency resources.

900 11 FIG. In some aspects, the methodfurther includes receiving configuration information, from a network entity, indicating: the first number of frequency resources occupied by each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources, and the second number of frequency resources separating each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources. In some cases, the operations of this step refer to, or may be performed by, circuitry for receiving and/or code for receiving as described with reference to.

In some aspects, the message comprises one of a radio resource control (RRC) message, a layer 2 (L2) message, or a downlink control information (DCI) message.

In some aspects, the indication of at least the first interlace of frequency resources comprises a bitmap; the bitmap comprises a plurality of bits; and each different bit of the plurality of bits corresponds to a different interlace of frequency resources of the plurality of interlaces of frequency resources.

In some aspects, a first bit value of the different bit indicates that the different interlace corresponding to that different bit is assigned to the UE; and a second bit value of the different bit indicates that the different interlace corresponding to that different bit is not assigned to the UE.

In some aspects, the indication of the subset of frequency resources in the second FDRA comprises a resource indication value (RIV); and the RIV indicates a starting interlace and a number of contiguous interlaces that are assigned to the UE.

In some aspects, the indication of a subset of frequency resources in the second FDRA comprises an indication of a set of virtual resource blocks (VRBs) included within one or more resource block groups (RBGs) defined within the continuous set of frequency resources; the set of VRBs maps to a corresponding set of physical resource blocks (PRBs) in the continuous set of frequency resources indicated in the first FDRA based on an RBG-based VRB-to-PRB interleaver; and the subset of frequency resources comprise the set of PRBs.

900 11 FIG. In some aspects, the methodfurther includes receiving an indication of an interleaver depth of the RBG-based VRB-to-PRB interleaver. In some cases, the operations of this step refer to, or may be performed by, circuitry for receiving and/or code for receiving as described with reference to.

In some aspects, the indication of the interleaver depth is received in radio resource control (RRC) signaling from a network entity.

900 11 FIG. In some aspects, the methodfurther includes determining the set of PRBs to which the set of VRBs correspond based on the interleaver depth of the RBG-based VRB-to-PRB interleaver. In some cases, the operations of this step refer to, or may be performed by, circuitry for determining and/or code for determining as described with reference to.

In some aspects, the continuous set of frequency resources are included within a bandwidth part (BWP).

In some aspects, the RBG-based VRB-to-PRB interleaver is defined with respect to the continuous set of frequency resources indicated in the first FDRA.

In some aspects, the set of VRBs are defined with respect to the BWP.

In some aspects, the indication of the set of VRBs comprises one of: a bitmap defined with respect to the continuous set of frequency resources indicated in the first FDRA; or a resource indication value (RIV) defined with respect to the continuous set of frequency resources indicated in the first FDRA.

900 1100 900 1100 11 FIG. In one aspect, method, or any aspect related to it, may be performed by an apparatus, such as communications deviceof, which includes various components operable, configured, or adapted to perform the method. Communications deviceis described below in further detail.

9 FIG. Note thatis just one example of a method, and other methods including fewer, additional, or alternative steps are possible consistent with this disclosure.

10 FIG. 1 3 FIGS.and 2 FIG. 1000 102 shows an example of a methodof wireless communication at a network entity, such as a BSof, or a disaggregated base station as discussed with respect to.

1000 1005 12 FIG. Methodbegins at stepwith transmitting a first frequency domain resource allocation (FDRA) comprising an indication of a continuous set of frequency resources allocated for transmission of a plurality of frequency-division multiplexed (FDMed) physical downlink shared channel (PDSCH) transmissions for a plurality of user equipments (UEs), including a UE. In some cases, the operations of this step refer to, or may be performed by, circuitry for transmitting and/or code for transmitting as described with reference to.

1000 1010 12 FIG. Methodthen proceeds to stepwith transmitting a second FDRA comprising an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for the UE are scheduled. In some cases, the operations of this step refer to, or may be performed by, circuitry for transmitting and/or code for transmitting as described with reference to.

1000 1015 12 FIG. Methodthen proceeds to stepwith transmitting, using the first FDRA and the second FDRA, the one or more PDSCH transmissions for the UE on the subset of frequency resources. In some cases, the operations of this step refer to, or may be performed by, circuitry for transmitting and/or code for transmitting as described with reference to.

In some aspects, the one or more PDSCH transmissions for the UE are rate matched to the subset of frequency resources.

In some aspects, the plurality of FDMed PDSCH transmissions for the plurality of UEs share a same wide-band precoder.

In some aspects, a set of shared demodulation reference signals (DMRSs) are scheduled for transmission across the continuous set of frequency resources.

In some aspects, at least some DMRSs of the set of shared DMRSs are contiguous in a frequency domain.

In some aspects, the set of shared DMRSs are scheduled in frequency resources, of the continuous set of frequency resources, that are not scheduled for PDSCH transmissions of the plurality of FDMed PDSCH transmissions.

In some aspects, the continuous set of frequency resources comprises a plurality of interlaces of frequency resources.

In some aspects, each interlace of frequency resources of the plurality of interlaces of frequency resources comprises a plurality of interlace clusters; each interlace cluster of the plurality of interlace clusters occupies a first number of frequency resources of the continuous set of frequency resources; and each interlace cluster of the plurality of interlace clusters is separated from another interlace cluster of the plurality of interlace clusters by a second number of frequency resources of the continuous set of frequency resources.

In some aspects, the first number of frequency resources comprise one of a first number of resource elements (REs) or a first number of resource blocks (RBs), and the second number of frequency resources comprise one of a second number of REs or a second number of RBs.

In some aspects, the indication of the subset of frequency resources in the second FDRA comprises an indication of at least a first interlace of frequency resources assigned to the UE on which the one or more PDSCH transmissions for the UE are scheduled; and the subset of frequency resources on which the one or more PDSCH transmissions for the UE are scheduled comprise the plurality of interlace clusters of at least the first interlace of frequency resources.

1000 12 FIG. In some aspects, the methodfurther includes transmitting a configuration information, to the UE, indicating: the first number of frequency resources occupied by each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources, and the second number of frequency resources separating each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources. In some cases, the operations of this step refer to, or may be performed by, circuitry for transmitting and/or code for transmitting as described with reference to.

In some aspects, the configuration information comprises one of a radio resource control (RRC) message, a layer 2 (L2) message, or a downlink control information (DCI) message.

In some aspects, the indication of at least the first interlace of frequency resources comprises a bitmap; the bitmap comprises a plurality of bits; and each different bit of the plurality of bits corresponds to a different interlace of frequency resources of the plurality of interlaces of frequency resources.

In some aspects, a first bit value of the different bit indicates that the different interlace corresponding to that different bit is assigned to the UE; and a second bit value of the different bit indicates that the different interlace corresponding to that different bit is not assigned to the UE.

1000 12 FIG. In some aspects, the methodfurther includes transmitting an indication of an interleaver depth of the RBG-based VRB-to-PRB interleaver. In some cases, the operations of this step refer to, or may be performed by, circuitry for transmitting and/or code for transmitting as described with reference to.

In some aspects, the RBG-based VRB-to-PRB interleaver is defined with respect to the continuous set of frequency resources indicated in the first FDRA.

In some aspects, the set of VRBs are defined with respect to the BWP.

In some aspects, the indication of the set of VRBs comprises one of: a bitmap defined with respect to the continuous set of frequency resources indicated in the first FDRA; or a resource indication value (RIV) defined with respect to the continuous set of frequency resources indicated in the first FDRA.

In some aspects, the continuous set of frequency resources are included within a bandwidth part (BWP).

In some aspects, the indication of the subset of frequency resources in the second FDRA comprises a resource indication value (RIV); and the RIV indicates a starting interlace and a number of contiguous interlaces that are assigned to the UE.

In some aspects, the indication of the interleaver depth is received in radio resource control (RRC) signaling from a network entity.

In some aspects, the indication of a subset of frequency resources in the second FDRA comprises an indication of a set of virtual resource blocks (VRBs) included within one or more resource block groups (RBGs) defined within the continuous set of frequency resources; the set of VRBs maps to a corresponding set of physical resource blocks (PRBs) in the continuous set of frequency resources indicated in the first FDRA based on an RBG-based VRB-to-PRB interleaver; and the subset of frequency resources comprise the set of PRBs.

1000 1200 1000 1200 12 FIG. In one aspect, method, or any aspect related to it, may be performed by an apparatus, such as communications deviceof, which includes various components operable, configured, or adapted to perform the method. Communications deviceis described below in further detail.

10 FIG. Note thatis just one example of a method, and other methods including fewer, additional, or alternative steps are possible consistent with this disclosure.

11 FIG. 1 3 FIGS.and 1100 1100 104 depicts aspects of an example communications device. In some aspects, communications deviceis a user equipment, such as UEdescribed above with respect to.

1100 1105 1155 1155 1100 1160 1105 1100 1100 The communications deviceincludes a processing systemcoupled to the transceiver(e.g., a transmitter and/or a receiver). The transceiveris configured to transmit and receive signals for the communications devicevia the antenna, such as the various signals as described herein. The processing systemmay be configured to perform processing functions for the communications device, including processing signals received and/or to be transmitted by the communications device.

1105 1110 1110 358 364 366 380 1110 1130 1150 1130 1110 1110 900 1100 1110 1100 3 FIG. 9 FIG. The processing systemincludes one or more processors. In various aspects, the one or more processorsmay be representative of one or more of receive processor, transmit processor, TX MIMO processor, and/or controller/processor, as described with respect to. The one or more processorsare coupled to a computer-readable medium/memoryvia a bus. In certain aspects, the computer-readable medium/memoryis configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors, cause the one or more processorsto perform the methoddescribed with respect to, or any aspect related to it. Note that reference to a processor performing a function of communications devicemay include one or more processorsperforming that function of communications device.

1130 1135 1140 1145 1135 1140 1145 1100 900 9 FIG. In the depicted example, computer-readable medium/memorystores code (e.g., executable instructions), such as code for receiving, code for demodulating, and code for determining. Processing of the code for receiving, code for demodulating, and code for determiningmay cause the communications deviceto perform the methoddescribed with respect to, or any aspect related to it.

1110 1130 1115 1120 1125 1115 1120 1125 1100 900 9 FIG. The one or more processorsinclude circuitry configured to implement (e.g., execute) the code stored in the computer-readable medium/memory, including circuitry such as circuitry for receiving, circuitry for demodulating, and circuitry for determining. Processing with circuitry for receiving, circuitry for demodulating, and circuitry for determiningmay cause the communications deviceto perform the methoddescribed with respect to, or any aspect related to it.

1100 900 354 352 104 1155 1160 1100 354 352 104 1155 1160 1100 9 FIG. 3 FIG. 11 FIG. 3 FIG. 11 FIG. Various components of the communications devicemay provide means for performing the methoddescribed with respect to, or any aspect related to it. For example, means for transmitting, sending or outputting for transmission may include transceiversand/or antenna(s)of the UEillustrated inand/or the transceiverand the antennaof the communications devicein. Means for receiving or obtaining may include transceiversand/or antenna(s)of the UEillustrated inand/or the transceiverand the antennaof the communications devicein.

12 FIG. 1 3 FIGS.and 2 FIG. 1200 1200 102 depicts aspects of an example communications device. In some aspects, communications deviceis a network entity, such as BSof, or a disaggregated base station as discussed with respect to.

1200 1205 1235 1245 1235 1200 1240 1245 1200 1205 1200 1200 2 FIG. The communications deviceincludes a processing systemcoupled to the transceiver(e.g., a transmitter and/or a receiver) and/or a network interface. The transceiveris configured to transmit and receive signals for the communications devicevia the antenna, such as the various signals as described herein. The network interfaceis configured to obtain and send signals for the communications devicevia communication link(s), such as a backhaul link, midhaul link, and/or fronthaul link as described herein, such as with respect to. The processing systemmay be configured to perform processing functions for the communications device, including processing signals received and/or to be transmitted by the communications device.

1205 1210 1210 338 320 330 340 1210 1220 1230 1220 1210 1210 1000 1200 1210 1200 3 FIG. 10 FIG. The processing systemincludes one or more processors. In various aspects, one or more processorsmay be representative of one or more of receive processor, transmit processor, TX MIMO processor, and/or controller/processor, as described with respect to. The one or more processorsare coupled to a computer-readable medium/memoryvia a bus. In certain aspects, the computer-readable medium/memoryis configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors, cause the one or more processorsto perform the methoddescribed with respect to, or any aspect related to it. Note that reference to a processor of communications deviceperforming a function may include one or more processorsof communications deviceperforming that function.

1220 1225 1225 1200 1000 10 FIG. In the depicted example, the computer-readable medium/memorystores code (e.g., executable instructions), such as code for transmitting. Processing of the code for transmittingmay cause the communications deviceto perform the methoddescribed with respect to, or any aspect related to it.

1210 1220 1215 1215 1200 1000 10 FIG. The one or more processorsinclude circuitry configured to implement (e.g., execute) the code stored in the computer-readable medium/memory, including circuitry such as circuitry for transmitting. Processing with circuitry for transmittingmay cause the communications deviceto perform the methoddescribed with respect to, or any aspect related to it.

1200 1000 332 334 102 1235 1240 1200 332 334 102 1235 1240 1200 10 FIG. 3 FIG. 12 FIG. 3 FIG. 12 FIG. Various components of the communications devicemay provide means for performing the methoddescribed with respect to, or any aspect related to it. Means for transmitting, sending or outputting for transmission may include transceiversand/or antenna(s)of the BSillustrated inand/or the transceiverand the antennaof the communications devicein. Means for receiving or obtaining may include transceiversand/or antenna(s)of the BSillustrated inand/or the transceiverand the antennaof the communications devicein.

Implementation examples are described in the following numbered clauses:

Clause 1: A method for wireless communication at a user equipment (UE), comprising: receiving a first frequency domain resource allocation (FDRA) comprising an indication of a continuous set of frequency resources allocated for transmission of a plurality of frequency-division multiplexed (FDMed) physical downlink shared channel (PDSCH) transmissions for a plurality of UEs, including the UE; receiving a second FDRA comprising an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for the UE are scheduled; and receiving, using the first FDRA and the second FDRA, the one or more PDSCH transmissions for the UE on the subset of frequency resources.

Clause 2: The method of Clause 1, wherein the one or more PDSCH transmissions for the UE are rate matched to the subset of frequency resources.

Clause 3: The method of any one of Clauses 1-2, wherein the plurality of FDMed PDSCH transmissions for the plurality of UEs share a same wide-band precoder.

Clause 4: The method of any one of Clauses 1-3, wherein: a set of shared demodulation reference signals (DMRSs) are scheduled for transmission across the continuous set of frequency resources; and the method further comprises: receiving one or more DMRSs of the set of shared DMRSs; and demodulating the received one or more PDSCH transmissions based on the received one or more DMRSs.

Clause 5: The method of Clause 4, wherein at least some DMRSs of the set of shared DMRSs are contiguous in a frequency domain.

Clause 6: The method of Clause 4, wherein the set of shared DMRSs are scheduled in frequency resources, of the continuous set of frequency resources, that are not scheduled for PDSCH transmissions of the plurality of FDMed PDSCH transmissions.

Clause 7: The method of any one of Clauses 1-6, wherein the continuous set of frequency resources comprises a plurality of interlaces of frequency resources.

Clause 8: The method of Clause 7, wherein: each interlace of frequency resources of the plurality of interlaces of frequency resources comprises a plurality of interlace clusters; each interlace cluster of the plurality of interlace clusters occupies a first number of frequency resources of the continuous set of frequency resources; and each interlace cluster of the plurality of interlace clusters is separated from another interlace cluster of the plurality of interlace clusters by a second number of frequency resources of the continuous set of frequency resources.

Clause 9: The method of Clause 8, wherein: the first number of frequency resources comprise one of a first number of resource elements (REs) or a first number of resource blocks (RBs), and the second number of frequency resources comprise one of a second number of REs or a second number of RBs.

Clause 10: The method of Clause 8, wherein: the indication of the subset of frequency resources in the second FDRA comprises an indication of at least a first interlace of frequency resources assigned to the UE on which the one or more PDSCH transmissions for the UE are scheduled; and the subset of frequency resources on which the one or more PDSCH transmissions for the UE are scheduled comprise the plurality of interlace clusters of at least the first interlace of frequency resources.

Clause 11: The method of Clause 10, further comprising receiving configuration information, from a network entity, indicating: the first number of frequency resources occupied by each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources, and the second number of frequency resources separating each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources.

Clause 12: The method of Clause 11, wherein the message comprises one of a radio resource control (RRC) message, a layer 2 (L2) message, or a downlink control information (DCI) message.

Clause 13: The method of Clause 10, wherein: the indication of at least the first interlace of frequency resources comprises a bitmap; the bitmap comprises a plurality of bits; and each different bit of the plurality of bits corresponds to a different interlace of frequency resources of the plurality of interlaces of frequency resources.

Clause 14: The method of Clause 13, wherein: a first bit value of the different bit indicates that the different interlace corresponding to that different bit is assigned to the UE; and a second bit value of the different bit indicates that the different interlace corresponding to that different bit is not assigned to the UE.

Clause 15: The method of Clause 10, wherein: the indication of the subset of frequency resources in the second FDRA comprises a resource indication value (RIV); and the RIV indicates a starting interlace and a number of contiguous interlaces that are assigned to the UE.

Clause 16: The method of any one of Clauses 1-15, wherein: the indication of a subset of frequency resources in the second FDRA comprises an indication of a set of virtual resource blocks (VRBs) included within one or more resource block groups (RBGs) defined within the continuous set of frequency resources; the set of VRBs maps to a corresponding set of physical resource blocks (PRBs) in the continuous set of frequency resources indicated in the first FDRA based on an RBG-based VRB-to-PRB interleaver; and the subset of frequency resources comprise the set of PRBs.

Clause 17: The method of Clause 16, further comprising receiving an indication of an interleaver depth of the RBG-based VRB-to-PRB interleaver.

Clause 18: The method of Clause 17, wherein the indication of the interleaver depth is received in radio resource control (RRC) signaling from a network entity.

Clause 19: The method of Clause 17, further comprising determining the set of PRBs to which the set of VRBs correspond based on the interleaver depth of the RBG-based VRB-to-PRB interleaver.

Clause 20: The method of Clause 16, wherein the continuous set of frequency resources are included within a bandwidth part (BWP).

Clause 21: The method of Clause 20, wherein the RBG-based VRB-to-PRB interleaver is defined with respect to the continuous set of frequency resources indicated in the first FDRA.

Clause 22: The method of Clause 20, wherein the set of VRBs are defined with respect to the BWP.

Clause 23: The method of Clause 20, wherein the indication of the set of VRBs comprises one of: a bitmap defined with respect to the continuous set of frequency resources indicated in the first FDRA; or a resource indication value (RIV) defined with respect to the continuous set of frequency resources indicated in the first FDRA.

Clause 24: A method for wireless communication at a network entity, comprising: transmitting a first frequency domain resource allocation (FDRA) comprising an indication of a continuous set of frequency resources allocated for transmission of a plurality of frequency-division multiplexed (FDMed) physical downlink shared channel (PDSCH) transmissions for a plurality of user equipments (UEs), including a UE; transmitting a second FDRA comprising an indication of a subset of frequency resources, of the continuous set of frequency resources, on which one or more PDSCH transmissions, of the plurality of FDMed PDSCH transmissions, for the UE are scheduled; and transmitting, using the first FDRA and the second FDRA, the one or more PDSCH transmissions for the UE on the subset of frequency resources.

Clause 25: The method of Clause 24, wherein the one or more PDSCH transmissions for the UE are rate matched to the subset of frequency resources.

Clause 26: The method of any one of Clauses 24-25, wherein the plurality of FDMed PDSCH transmissions for the plurality of UEs share a same wide-band precoder.

Clause 27: The method of any one of Clauses 24-26, wherein: a set of shared demodulation reference signals (DMRSs) are scheduled for transmission across the continuous set of frequency resources.

Clause 28: The method of Clause 27, wherein at least some DMRSs of the set of shared DMRSs are contiguous in a frequency domain.

Clause 29: The method of Clause 27, wherein the set of shared DMRSs are scheduled in frequency resources, of the continuous set of frequency resources, that are not scheduled for PDSCH transmissions of the plurality of FDMed PDSCH transmissions.

Clause 30: The method of any one of Clauses 24-29, wherein the continuous set of frequency resources comprises a plurality of interlaces of frequency resources.

Clause 31: The method of Clause 30, wherein: each interlace of frequency resources of the plurality of interlaces of frequency resources comprises a plurality of interlace clusters; each interlace cluster of the plurality of interlace clusters occupies a first number of frequency resources of the continuous set of frequency resources; and each interlace cluster of the plurality of interlace clusters is separated from another interlace cluster of the plurality of interlace clusters by a second number of frequency resources of the continuous set of frequency resources.

Clause 32: The method of Clause 31, wherein: the first number of frequency resources comprise one of a first number of resource elements (REs) or a first number of resource blocks (RBs), and the second number of frequency resources comprise one of a second number of REs or a second number of RBs.

Clause 33: The method of Clause 31, wherein: the indication of the subset of frequency resources in the second FDRA comprises an indication of at least a first interlace of frequency resources assigned to the UE on which the one or more PDSCH transmissions for the UE are scheduled; and the subset of frequency resources on which the one or more PDSCH transmissions for the UE are scheduled comprise the plurality of interlace clusters of at least the first interlace of frequency resources.

Clause 34: The method of Clause 33, further comprising transmitting a configuration information, to the UE, indicating: the first number of frequency resources occupied by each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources, and the second number of frequency resources separating each interlace cluster of the plurality of interlace clusters of at least the first interlace of frequency resources.

Clause 35: The method of Clause 34, wherein the configuration information comprises one of a radio resource control (RRC) message, a layer 2 (L2) message, or a downlink control information (DCI) message.

Clause 36: The method of Clause 33, wherein: the indication of at least the first interlace of frequency resources comprises a bitmap; the bitmap comprises a plurality of bits; and each different bit of the plurality of bits corresponds to a different interlace of frequency resources of the plurality of interlaces of frequency resources.

Clause 37: The method of Clause 36, wherein: a first bit value of the different bit indicates that the different interlace corresponding to that different bit is assigned to the UE; and a second bit value of the different bit indicates that the different interlace corresponding to that different bit is not assigned to the UE.

Clause 38: The method of Clause 33, wherein: the indication of the subset of frequency resources in the second FDRA comprises a resource indication value (RIV); and the RIV indicates a starting interlace and a number of contiguous interlaces that are assigned to the UE.

Clause 39: The method of any one of Clauses 24-38, wherein: the indication of a subset of frequency resources in the second FDRA comprises an indication of a set of virtual resource blocks (VRBs) included within one or more resource block groups (RBGs) defined within the continuous set of frequency resources; the set of VRBs maps to a corresponding set of physical resource blocks (PRBs) in the continuous set of frequency resources indicated in the first FDRA based on an RBG-based VRB-to-PRB interleaver; and the subset of frequency resources comprise the set of PRBs.

Clause 40: The method of Clause 37, further comprising transmitting an indication of an interleaver depth of the RBG-based VRB-to-PRB interleaver.

Clause 41: The method of Clause 38, wherein the indication of the interleaver depth is received in radio resource control (RRC) signaling from a network entity.

Clause 42: The method of Clause 37, wherein the continuous set of frequency resources are included within a bandwidth part (BWP).

Clause 43: The method of Clause 40, wherein the RBG-based VRB-to-PRB interleaver is defined with respect to the continuous set of frequency resources indicated in the first FDRA.

Clause 44: The method of Clause 40, wherein the set of VRBs are defined with respect to the BWP.

Clause 45: The method of Clause 40, wherein the indication of the set of VRBs comprises one of: a bitmap defined with respect to the continuous set of frequency resources indicated in the first FDRA; or a resource indication value (RIV) defined with respect to the continuous set of frequency resources indicated in the first FDRA.

Clause 46: An apparatus, comprising: at least one memory comprising executable instructions; and at least one processor configured to execute the executable instructions and cause the apparatus to perform a method in accordance with any combination of Clauses 1-45.

Clause 47: An apparatus, comprising means for performing a method in accordance with any combination of Clauses 1-45.

Clause 48: A non-transitory computer-readable medium comprising executable instructions that, when executed by at least one processor of an apparatus, cause the apparatus to perform a method in accordance with any combination of Clauses 1-45.

Clause 49: A computer program product embodied on a computer-readable storage medium comprising code for performing a method in accordance with any combination of Clauses 1-45.

The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein are not limiting of the scope, applicability, or aspects set forth in the claims. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. For example, changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For instance, the methods described may be performed in an order different from that described, and various actions may be added, omitted, or combined. Also, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method that is practiced using other structure, functionality, or structure and functionality in addition to, or other than, the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

The various illustrative logical blocks, modules and circuits described in connection with the present disclosure may be implemented or performed with a general purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, a system on a chip (SoC), or any other such configuration.

As used herein, “a processor,” “at least one processor” or “one or more processors” generally refers to a single processor configured to perform one or multiple operations or multiple processors configured to collectively perform one or more operations. In the case of multiple processors, performance of the one or more operations could be divided amongst different processors, though one processor may perform multiple operations, and multiple processors could collectively perform a single operation. Similarly, “a memory,” “at least one memory” or “one or more memories” generally refers to a single memory configured to store data and/or instructions, multiple memories configured to collectively store data and/or instructions.

In some cases, rather than actually transmitting a signal, an apparatus (e.g., a wireless node or device) may have an interface to output the signal for transmission. For example, a processor may output a signal, via a bus interface, to a radio frequency (RF) front end for transmission. Accordingly, a means for outputting may include such an interface as an alternative (or in addition) to a transmitter or transceiver. Similarly, rather than actually receiving a signal, an apparatus (e.g., a wireless node or device) may have an interface to obtain a signal from another device. For example, a processor may obtain (or receive) a signal, via a bus interface, from an RF front end for reception. Accordingly, a means for obtaining may include such an interface as an alternative (or in addition) to a receiver or transceiver.

While the present disclosure may describe certain operations as being performed by one type of wireless node, the same or similar operations may also be performed by another type of wireless node. For example, operations performed by a user equipment (UE) may also (or instead) be performed by a network entity (e.g., a base station or unit of a disaggregated base station). Similarly, operations performed by a network entity may also (or instead) be performed by a UE.

Further, while the present disclosure may describe certain types of communications between different types of wireless nodes (e.g., between a network entity and a UE), the same or similar types of communications may occur between same types of wireless nodes (e.g., between network entities or between UEs, in a peer-to-peer scenario). Further, communications may occur in reverse order than described.

As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

As used herein, the term “determining” encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.

The methods disclosed herein comprise one or more actions for achieving the methods. The method actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of actions is specified, the order and/or use of specific actions may be modified without departing from the scope of the claims. Further, the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions. The means may include various hardware and/or software component(s) and/or module(s), including, but not limited to a circuit, an application specific integrated circuit (ASIC), or processor.

The following claims are not intended to be limited to the aspects shown herein, but are to be accorded the full scope consistent with the language of the claims. Within a claim, reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more.” Unless specifically stated otherwise, the term “some” refers to one or more. No claim element is to be construed under the provisions of 35 U.S.C. § 112(f) unless the element is expressly recited using the phrase “means for”. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims.